M. A. Potopnyk, V. S. Matiychuk, and M. D. Obushak, “Heterocyclisation on the basis of ethyl 1-aryl-4-(bromoacetyl)-5-methyl-1h-pyrazo-le-3-carboxylates”, J. Org. Pharm. Chem., vol. 11, no. 3(43), pp. 56–61, Sep. 2013.